Air quality monitor



FIG. 1 is a front perspective view of an air quality monitor, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left-side view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The contrast shown in grayscale in the figures represents a contrast of appearance. 

CLAIM The ornamental design for an air quality monitor, as shown and described. 